I have subscribe to this list for quiet a while for a friend, Jean Van Orman, who is not on the net yet. I am trying to get her on the net now. She is a volunteer for the Ohio Parkinson's Foundation Southwest Region. She has the following question. I am interested in information on toxic effects of manganese for a friend who is a welder and has been diagnosed with Parkinson's disease. Would appreciate knowing what has been published about research on the treatment and prognosis. Thanks from both of us. Von W. Rix [log in to unmask] NMRI/TD, Wright-Patterson AFB, OH Tri-Service Toxicology Consortium